Bio 141 Notes (1/23/14)

Question 0

Gives each atom identity

Answer 0

Protons

Atomic number

Question 1

Atoms

Answer 1

Can’t be divided any further
Composed of nucleus (center) - neutrons and protons (positive)
Electrons (outside) negative

Question 2

How many electrons fill the shells

Answer 2

1st - 2
2nd - 8
3rd - 8

Question 3

Atoms with filled shells are…

Answer 3

stable, inert, non-reactive

Question 4

inert gases (ex.)

Answer 4

Neon, Helium, Argon

their shells are full

Question 5

Ions

Answer 5

Formed when atoms borrow electrons

Question 6

Ionic Bonds

Answer 6

taken not shared

Question 7

Cation

Answer 7

positively charged ion

Question 8

Anion

Answer 8

negatively charged ion

Question 9

acids give…

Answer 9

H+

Question 10

Bases give..

Answer 10

OH-

Question 11

Stable Ions

Answer 11

dissolve easily in water

Question 12

Covalent Bonds

Answer 12

share electrons

Question 13

Hydrogen Bonds

Answer 13

weak electrical forces cause an attraction (like magnets)

weak molecules are polar

Question 14

Hydrophilic

Answer 14

love water

polar

Question 15

Hydrophobic

Answer 15

Hate water

non polar

Question 16

Cohesion

Answer 16

water sticking to itself

surface tension

Question 17

Adhesion

Answer 17

Water sticking to other molecules

capillary action

Question 18

Functional Groups

Answer 18

small but significant

affect physical properties, polarity, charge, reactivity

Question 19

Monomers

Answer 19

consist of one molecule unit

Question 20

Condensation Reaction

Answer 20

forming bonds releases water

Question 21

Hydrolisis

Answer 21

breaking bonds requires water imput

Question 22

Polymers

Answer 22

simple molecules and macromolecules